My mother recently suggested that I read this. I am a very self-driven sales professional, and was independent for about six years.
I had to remember what it takes to succeed in a large corporation. I was going to summarize this book, but there were already many in existence.
Here are a few summaries I like:
http://www.scribd.com/mobile/doc/3152662
http://www.westegg.com/unmaintained/carnegie/win-friends.html